The Arizona-Sonora Desert Museum has a digital library containing thousands of photographs of plants and animals. The digital library is an interactive site that has a kidâs page with videos, animal sounds, and games.
The photo is courtesy of: http://members.multimania.nl/onager/ballista.htmlMangonelThe Mangonel is what many people think of when they think of a catapult. From the Latin word manganon meaning engine of war. The Mangonel was invented by the Romans in 400 BC. The Mangonel consists of a long wood arm with a bucket (early models used a sling) with a rope attached to the end. The arm is then pulled back (from natural 90o angle) then energy was stored in the tension of the rope and the arm. Then the bucket would be loaded.
A catapult is a ballistic device used to launch a projectile a great distance without the aid of explosive devicesâparticularly various types of ancient and medieval siege engines. In use since ancient times, the catapult has proven to be one of the most effective mechanisms during warfare. In modern times the term can apply to devices ranging from a simple hand-held implement to a mechanism for launching aircraft from a ship.